How far is Colerain, OH from Union, OH?
The driving distance from Colerain, OH to Union, OH is about 198.6 miles (319.6 km), with a travel time of about 03h 49m by car.
- The straight-line flight distance is about 185.7 miles (298.9 km).
- For a round trip, plan for roughly 07h 39m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM EDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 03h 49m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Human settlement in Licking County, Ohio, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Widespread Frost then Sunny
Widespread Frost
Driving Route Map
The map below follows the saved road route between Colerain and Union.
Turn-by-Turn Driving Directions
Step-by-step road directions between Colerain and Union.
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1
Start on Colerain Road
1.4 km · 1 min · Colerain Road
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2
Turn left onto Barton Colerain Road
2.3 mi · 6 min · Barton Colerain Road
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3
Turn left onto Barton Road
116 m · 12 sec · Barton Road
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4
At the end of the road, turn right onto Main Street
736 ft · 20 sec · Main Street
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5
Continue on Barton Road
3.5 mi · 8 min · Barton Road
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6
At the end of the road, turn right onto East Main Street
1.5 mi · 2 min · East Main Street
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7
Continue on National Road West
1.2 km · 1 min · National Road West
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8
Take the ramp slight right
1623 ft · 40 sec
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9
Merge slight left
115 mi · 2 hr 6 min
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10
Keep slight left to continue on South Innerbelt
1.5 km · 1 min · South Innerbelt
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11
Continue on West Freeway
69.7 mi · 1 hr 17 min · West Freeway
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12
Take the exit slight right toward SR 48: Englewood, Clayton
2263 ft · 59 sec
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13
Turn right onto South Main Street
3.1 mi · 5 min · South Main Street
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14
Arrive at your destination
0 m · 1 sec · North Main Street
Car Route Details
A richer read on the saved driving route between Colerain and Union.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
National Road West
Merge slight left
115 mi · 02h 06m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Widespread Frost then Sunny leaving Colerain and Widespread Frost near Union.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Colerain to Union?
The road trip is about 198.6 miles (319.6 km) and usually takes 03h 49m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Kirkersville is a useful midpoint, sitting about 99.1 miles from Colerain and 99.5 miles from Union.
How much longer is the road route than the straight-line distance?
The direct path is about 185.7 miles (298.9 km), while the road route adds roughly 12.9 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 8:00 AM EDT. If you want a more comfortable same-day return, try to leave by 9:20 AM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $25.97 one way or $51.94 round trip. Estimated CO2 is about 62.3 kg one way.
What should you check before leaving?
Before you leave, expect Widespread Frost then Sunny around Colerain and Widespread Frost near Union.
Stop Ideas Near Kirkersville
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Kirkersville.
Columbus, OH
Flight Path Map
This map shows the direct air route between Colerain and Union. Straight-line distance: 185.75 mi (298.94 km).
#1 Colerain
The most populous city in Hamilton County, Ohio.
| Population | 59,145 |
| Coordinates | 40.1259000, -80.8087000 |
| Altitude | 384 |
| Country | United States |
#2 Union
City in Montgomery and Miami Counties in the U.
| Population | 6,909 |
| Coordinates | 39.8978300, -84.3063300 |
| Altitude | 281 |
| Country | United States |
End: Union (-84.30633, 39.89783)
Estimated Travel Time
Distance: 320 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 37m |
| 40 mph (64.37 km/h) | 04h 57m |
| 50 mph (80.47 km/h) | 03h 58m |
| 60 mph (96.56 km/h) | 03h 18m |
| 70 mph (112.65 km/h) | 02h 50m |
| 80 mph (129 km/h) | 02h 28m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.71 | $25.97 | $51.94 |
| Mid-grade | $4.24 | $29.74 | $59.47 |
| Premium | $4.79 | $33.58 | $67.16 |
| Diesel | $4.30 | $30.17 | $60.34 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Ohio · May 03, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.